Jarral Omar A, Purkayastha Sanjay, Darzi Ara, Zacharakis Emmanouil
Department of Biosurgery and Surgical Technology, Imperial College London, St Mary's Hospital, London. United Kingdom.
J Gastroenterol Hepatol. 2010 Feb;25(2):429. doi: 10.1111/j.1440-1746.2010.06261.x.